參數(shù)資料
型號(hào)： TOP225Y
廠商： POWER INTEGRATIONS INC
元件分類： 穩(wěn)壓器
英文描述： Three-terminal Off-line PWM Switch
中文描述： 2.2 A SWITCHING REGULATOR, 110 kHz SWITCHING FREQ-MAX, PSFM3
封裝： TO-220, 3 PIN
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 472K
代理商： TOP225Y
TOP221-227
D
7/01
6
Figure 7. Schematic Diagram of a 4 W TOPSwitch-II Standby Power Supply using an 8 lead PDIP.
Application Examples
Following are just two of the many possible
TOPSwitch
implementations. Refer to the Data Book and Design Guide
for additional examples.
4 W Standby Supply using 8 Lead PDIP
Figure 7 shows a 4 W standby supply. This supply is used in
appliances where certain standby functions (e.g. real time
clock, remote control port) must be kept active even while the
main power supply is turned off.
The 5 V secondary is used to supply the standby function and
the 12 V non-isolated output is used to supply power for the
PWM controller of the main power supply and other primary
side functions.
For this application the input rectifiers and input filter are sized
for the main supply and are not shown. The input DC rail may
vary from 100 V to 380 V DC which corresponds to the full
universal AC input range. The TOP221 is packaged in an 8 pin
power DIP package.
The output voltage (5 V) is directly sensed by the Zener diode
(VR1) and the optocoupler (U2). The output voltage is determined
by the sum of the Zener voltage and the voltage drop across the
LED of the optocoupler (the voltage drop across R1 is negligible).
The output transistor of the optocoupler drives the CONTROL
pin of the TOP221. C5 bypasses the CONTROL pin and provides
control loop compensation and sets the auto-restart frequency.
The transformer
’
s leakage inductance voltage spikes are snubbed
by R3 and C1 through diode D1. The bias winding is rectified
and filtered by D3 and C4 providing a non-isolated 12 V output
which is also used to bias the collector of the optocoupler
’
s
output transistor. The isolated 5 V output winding is rectified by
D2 and filtered by C2, L1 and C3.
Wide-Range
DC Input
D
S
C
CONTROL
PI-2115-040401
+
-
R3
47 k
D1
UF4005
C1
2.2 nF
1 kV
D2
UF5401
TOP221P
L1
3.3
μ
H
D3
1N4148
C4
100
μ
F
16 V
U2
PC817A
R1
10
C3
100
μ
F
10 V
+5 V
C5
47
μ
F
10 V
C2
330
μ
F
10 V
U1
R2
100
VR1
TOPSwitch-II
T1
RTN
+
-
12 V Non-Isolated
相關(guān)PDF資料
PDF描述
TOP242 Family Extended Power, Design Flexible,Integrated Off-line Switcher
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TOP249Y Family Extended Power, Design Flexible,Integrated Off-line Switcher
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TOP225YN 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 60W 85-265 VAC 100W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP226Y 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 75W 85-265 VAC 125W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP226YN 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 75W 85-265 VAC 125W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP227Y 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 90W 85-265 VAC 150W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
TOP227YN 功能描述:交流/直流開關(guān)轉(zhuǎn)換器 90W 85-265 VAC 150W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 輸出電壓:800 V 輸入/電源電壓（最大值）:23.5 V 輸入/電源電壓（最小值）:11.5 V 開關(guān)頻率:115 kHz 電源電流:1.6 mA 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SSO-10 封裝:Reel
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